Telefonaktiebolaget Lm Ericsson (publ)

Stefan Eriksson Löwenmark

Mårten Sundberg

John Walter Diachina

Olof Liberg

Paul Schliwa-Bertling

Nicklas Johansson

Miguel Lopez

Xingqin Lin

Talha Khan

Gustav Almquist

Zhipeng Lin

Jens Bergqvist

Helka-Liina Määttänen

Sebastian Euler

Daniel Widell

Jung-Fu Cheng

Daniel Chen Larsson

Havish Koorapaty

Magnus Åström

Emre Yavuz

Farshid Ghasemzadeh

Björn Hofström

Jonas Sedin

Eric Nordström

Ulf Händel

Daniel Larsson

Birgitta Sagebrand

Joakim Riedel

A method () performed by a wireless device () includes obtaining a remaining service time (T) associated with a first satellite or first spot beam. Based on the remaining service time, the wireless device determines whether to initiate a connection with the first satellite or first spot beam.

Power efficient non-terrestrial network connection establishment

Methods and apparatus for obtaining a frequency offset corresponding to a Doppler shift of transmission and/or reception frequencies between a wireless device and a network node. In one embodiment a method is performed by a wireless device for operating in a non-terrestrial network, NTN, the NTN having at least one network node and a communication satellite, wherein the at least one network node is one of a terrestrial base station and a satellite base station or satellite gateway, the method includes obtaining a frequency offset corresponding to a Doppler shift of transmission and/or reception frequencies between the wireless device and the network node and applying the frequency offset to an uplink transmission to the network node.

Frequency offset in non-terrestrial networks

Methods and apparatuses are disclosed for configuring a search space to the WD based on a Control Channel Element (CCE) limit of the WD. According to one or more embodiments, a network node configured to communicate with a wireless device is provided. The network node includes processing circuitry configured to receive a Control Channel Element, CCE, limit of the wireless device and configure a search space for the wireless device to monitor based at least in part on the CCE limit of the wireless device.

Channel monitoring with complexity constraints

Systems and methods are disclosed herein for frequency adjustment in a wireless network, particularly a Non-Terrestrial Network (NTN). Embodiments of a method performed by a User Equipment (UE) are disclosed. In one embodiment, a method performed by a UE for compensating for a Doppler shift in a wireless network comprises obtaining, from a network node, a characterization of Doppler variations in a particular cell. The method further comprises tuning a local frequency reference f, of the UE to a received downlink frequency for the particular cell and adjusting the local frequency reference f, over time according to the pre-calculated characterization of Doppler variations in the particular cell. In this manner, the communication between the UE and the network node in the presence of large and varying Doppler shifts is enabled. Embodiments related to compensating for timing drift are also disclosed.

Frequency adjustment for non-terrestrial networks

A method by a communication device for supporting a random access procedure in a wireless communication network. The communication device provides an indicator for indicating a presence of an initial access request by the communication device. The initial access request is part of the random access procedure. The indicator comprises a pre-defined synchronization sequence, wherein one of: the indicator comprises a first access burst extending over one time slot, wherein the first access burst comprises the pre-defined synchronization sequence, which is longer than 41 bits, and the indicator comprises a second access burst extending over two time slots, the second access burst comprising the pre-defined synchronization sequence, which is longer than 88 bits. The communication device transmits the indicator on a random access channel in uplink to a network node. The indicator indicates the presence to the network node of the initial access request.

Methods and arrangements for supporting a random access procedure

A Radio Network Node (RNN) and a method therein for providing improved robustness of a radio link between the RNN and a wireless device. The RNN and the wireless device operate in a communications network. The RNN transmits, towards the wireless device, a transmission with a first transmission mode associated with a first level of coverage extension. When a first period of time has elapsed, the RNN transmits, towards the wireless device, the transmission using a second transmission mode associated with a second level of coverage extension. The second level of coverage extension is higher than the first level of coverage extension.

Radio network node and a wireless device, and methods therein

Methods, wireless device () and wireless communication network (), such as a network node () thereof, for managing downlink signal information. The downlink signal information being information about signal quality and/or signal strength received by the wireless device () in a downlink. The wireless device () sends (), to the wireless communication network (), a message indicating said obtained downlink signal information and which message is associated with the wireless device () requesting access to the wireless communication network (). The downlink information being indicated in the message by a range that indicates how much the obtained downlink signal information exceeds a certain threshold. The range is determined based on a certain factor that the wireless communication network () has informed the wireless device () about.

Methods and arrangements for managing information about signal quality and/or signal strength received by a wireless device in a downlink

A wireless device, a Radio Access Network (RAN) node, and various methods are described herein for improving the coverage performance of the Extended Coverage (EC)-Random Access Channel (RACH). For instance, the wireless device, the RAN node, and various methods can improve the coverage performance of the EC-RACH by utilizing a new access burst (referred to herein as Extended Synchronization Access Burst (ESAB)), a new coding scheme (referred to herein as RACH11') for the CC5 2TS EC-RACH, and/or an access burst mapping scheme for the CC5 2TS EC-RACH.

Coding scheme and extended synchronization access burst for EC-GSM-IoT enhancement

A method is provided for improvising handover in a mobile station configured to operate a time division multiple access, TDMA, protocol in a global system for mobile communications, GSM, telecommunication network. The method comprises the steps of receiving a handover command requesting that the mobile station perform a handover operation from a serving cell to a target cell, and configuring the mobile station to transmit and receive user plane data with the serving cell and the target cell during a time period between receiving the handover command and the handover operation being completed.

Apparatus and method for improving handover in a global system for mobile communications

Methods, network node () and device () for managing a cell identity of a cell () in a GSM network (). The device () receives, from the network node (), a cell identifier for identifying said cell (), which cell identifier is a Base Station Identity Code, 'BSIC', coding an identity of said cell () and being formed of at least three sets of bits: A first three bits set thereof being a Network Color Code, 'NCC', a second three bits set thereof being a Base Station Color Code, &#x201c;BCC&#x201d;, and an additional third set thereof comprising one or more bits.

Extended base station identification code comprising a radio frequency color code

A mobile station (MS), a base station subsystem (BSS), and various methods are described herein that enable a positioning node (e.g., Serving Mobile Location Center (SMLC)) to improve the accuracy of estimating a position of the mobile station.

Providing estimated accuracy of mobile station synchronization and mobile station transmission offset to the network

A method is provided for improving handover in a mobile station configured to operate a time division multiple access, TDMA, protocol in a global system for mobile communications, GSM, telecommunication network. The method comprises the steps of receiving a handover command requesting that the mobile station perform a handover operation from a serving cell to a target cell, and configuring the mobile station to transmit and receive user plane data with the serving cell and the target cell during a time period between receiving the handover command and the handover operation being completed.

Providing estimated accuracy of mobile station synchronization to the network

The embodiments herein relate to a method performed by a transmitter () for transmitting data in a wireless communications network (). The transmitter () determines a change of a characteristic of a signal. The change of the characteristic is transparent to a first receiver () and carries information to a second receiver (). The transmitter () applies the determined change of the characteristic to the signal. The transmitter () transmits the signal with the applied change to the first receiver () and the second receiver ().

Growing community of inventors

Färentuna, Sweden

Stefan Eriksson Löwenmark